Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d458f2ac3db33d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 14:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1e6d15fd530388748e7dbb82ac3fffb SHA-1: 9d31e88bddbfa7d7ff4329d01efe835d35689fbd SHA-256: e6d458f2ac3db33dea77d5c952f0efd0a708807bf80126d2bd66f566a867f5a9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/123?utm_term=imperial+march+piano+sheet+music+free+easy PDF link annotation
    • http://joteruraxa.22web.org/what_is_rating_factor_of_cable.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/0gh4jij/5248764107.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/axSjiye/farm_bill_2020_details_upsc.pdfIn PDF document text
    • http://salonop.xyz/27896767665yj7gz.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/Uhajigd/8163857063.pdfIn PDF document text
    • http://teplotronic.ru/sosovab4h7m8.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/fgPhgFZ/jonuzijiru.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/hmHoDGa/resident_evil_movies_in_order_to_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/hNiiiaM/fipimixomipu.pdfIn PDF document text
    • http://erogan24.website/oracle_pl_sql_if_else_in_selectosmhp.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/gmm7gfv/2029912390.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/tojikif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/flotec_2_hp_sprinkler_pump_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41582e7-5e1a-4f97-9160-ecbdb7b6c7ce/fisher_price_infant_to_toddler_rocker_geo_diamonds_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582d85dd-17b0-44f5-b375-cbdb461be95d/5477088883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921406e2-7190-4c6d-90df-ea135dd89357/divina_commedia_inferno_canto_6_testo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a87e27e-5677-40c5-9dd7-732d6efeee13/popular_monster_bass_tabs.pdfIn PDF document text
    • http://wekiwuja.rf.gd/22734604480.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/55694242045.pdfIn PDF document text
    • http://zokitidekav.epizy.com/jokepijufesowanusabid.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/39697197559.pdfIn PDF document text
    • http://seniduvako.epizy.com/femakasanodebeburib.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/all_bangla_fonts_free_zip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 5296 bytes
SHA-256: 7ba49412eb1e34980bfc6057fa1dca050f37fdc927ad89011d77e7518da6e03c
font_01_sfnt_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 10840 bytes
SHA-256: 3e6142501ae45e45d5adb56be1a67a60d540d3df90c9863173216b90fd1176d9

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